Adjustable grinding wheel dresser



July 20, 1943. w, KROPF 2,324,937

. ADJUSTABLE GRINDING WHEEL DRESSER Filed May 5. 1945 jig-L 1s m IIIIIIII lnu enfor Patented July 20, 1943 new UNITED STATES PATENT or l I 1 2 324,937

Anms'rmn GRINDING nr'inssna Henry W: Kmpt, Muskegon Heights, Mien, as-

signor to Brick-ner-Kropf Machineflompany; Muskegon Heights, Mich a corporation of Michigan v ApplicationMay 3, 194a, Serial-Ne. 485,415

This invention relates to" grinding wheel dressers. and'is more particularly-directed to a grinding wheel dresser of an adjustable character and as a very desirable and practical improve-- ment upon the structure"dlsc'lose'd'in Patent No. 2,137,690 issued November 22', 1938. I

As shown irr'said prior patent a novel and very useful wheel dresser is provided. such construction however requires for the complete andfinal dressing of a grinding wheel the initial rough dressing with one dressing. diamond and, thereafter, a final dressingan'd finishing with another. Furthermore for each srzeor' diaineter of wheel dressed an adjustment of the table ofthegrihding machine is required inasmuch asithe location of the dressing diamond 'is'a't a fixed distance above the base on which it is mounted; or,'alternatively, for substantially'each diameter or size 1 of 'wheel treated. a dressing tool would need to be supplied. 7 V V In the present invention the'wheel dresser is of universal use for all diametersof' dressing wheels between a maximum and minimum limit of such diameters and also boththe'ro'ugl'i and finished dressings are 1 done without removal of the tool from the grinding machine WhiChlS' b eingitaken care of] that is, there is no takingfawa'y of" the roughdres'sing diamond and putting'in'its place the finisheddressing diamond with the supporting structure which each of them has as used in wheels.

Fig. 2 is an enlarged elevation of the improved wheel dresser.

Fig. 3 is a plan view thereof with a part broken away and shown in section for better disclosure, and

Fig. 4 is a fragmentary elevation. of the lower part of the wheel dresser, the elevation being at right angles to that shown in Fig. 1.

Like reference characters refer to like parts in the different figures of the drawing.

In the use of my invention a guiding templet carrying base I has at one edge thereof, the guiding templet 2 mounted thereon by means of a clamp 3, the free edge of the templet being shaped in accordance with the contour of the grinding wheel to be'dr'esse'd; Upon-the ba'se I the wheel dresser of the invention is placed and is movable thereover. p 1 Such wheel dresser includes a base rnavinga fiat horizontal under side" to bear upon-the flat upper side of the base I; previously described: From the base 4' at opposite sides guiding mem' bers' 5- and e'extend', shaped attheir ends to engage the templet 2' andbeing located directly below and in the. same vertical plane with the dressing diamonds mounted thereab'ove and. navingthesame shape andiform. g I

In the present invention a; post [preferably square in cross section is in fixed connectionwith the base 4 and extends upwardlytherefi'om: At one of the sides a-corner is cut away'ieaving'a fiat surface 8 upon' which asuitable indicating scale is made' asshmm. V

Onthe post "I a hubor sleeveSds mounted for vertical adjustment from-opposite si'des'bf which arms I8" extend outwardiywhich attheirouter ends carry the supports- 5d and fiu'fo'r diamond dressers'whi'ch are secured at their outer ends, said supports 5a and 6d beingl'ocated directly over thete'mpl'et engaging ears-s 5- and fi-prev'lous ly described; Y A clampingscrew -I I is threaded 't-i'irdugh' the hub or sleeve 3 having" 's axissubstantia'ily at right angles t'o the-fpidne" cr me-surfaces, and at its inner end is with a-bearin'g ber I2 with which it has a swivel connection, the inner surface of said member I2 riding against the flat surface 8 on the post '1. With this construction the hub 9, arms I0 and the diamond dressers may be adjusted and held in any position to which adjusted in the length of the surface 8 on the post I, as is evident.

The templet base I in the use of the invention is placed upon the upper side of the table I 3 of the grinder and located so that the templet 2 is directly below the wheel II which is to be dressed and is adjusted and placed and held so that the free edge of the templet will govern the dressing of the surface of the grinding wheel at the plane for the first or rough dressing of the wheel for example by the diamond carried by the part 5a, and then by moving the tool around to occupy a position at 180 from its original position and bringing the guide 6 of the dressing diamond 6a against the templet, the finishing dressing of the wheel is performed.

With a wheel of a different diameter, such as indicated in dotted lines at I in Fig. 1, the clamping screw H is loosened and the dressing diamonds lowered so as to be in horizontal alinement with the axis of the wheel at I5, the rough and finishing operations being performed as before.

With this invention there is an avoidance of moving the grinding wheel table up and down for dressing and the guiding point on the member 5 and t-e dressing diamond may be brought closer together than with the previous wheel dresser described in the patent above mentioned, with a greater avoidance of any tendency of the post which carries the dressing diamond to vibrate which, if it occurs, is disadvantageous to accurate grinding wheel dressing.

The invention is defined in the appended claims and is to be considered comprehensive of all forms of structure coming within their scope.

I claim: 1. Apparatus for dressing grinding wheels to a desired contour comprising, a base member, a templet mounted thereon having a predetermined contour at one edge for reproduction on the peripheral face of a grinding wheel, a member having a base resting upon and adapted to be moved over the upper side of the first mentioned base in any direction, a plurality of guiding members extending from said second base each of which is selectively adapted to be brought against the contour edge of said templet, a post extending upwardly from said second base, a member mounted on said post for vertical adjustment thereon, means for securing said member to any position to which adjusted, arms on said member, one for each of the guide members and located directly thereabove, and a wheel dressing implement carried by each of said arms, any of said wheel dressing implements being adapted to be pointed toward and located in the same horizontal plane which the axis of the grinding wheel rotates, said guide ends and the dressing points of said dressing implements thereabove being in vertical alinement, as specified.

2. An apparatus for shaping grinding wheels including a base member adapted to be located with relation to a guiding templet, the edge of which templet is shaped according to the contour of the grinding wheel which is to be dressed, a plurality of guiding members mounted upon and extending horizontally from said base, a vertical post located centrally of the base, a dressing implement holder mounted for vertical adjustment on said post, means for securing the holder to any position to be adjusted, and a plurality of dressing implements carried thereby, one directly over each guiding member and having the points of said dressing implements in direct vertical alinement with the outer end portions of said guiding implements which are adapted to engage with said templet.

3. A construction containing the elements in combination defined in claim 2, said post being rectangular in cross section and having one corner portion cut away vertically for the major portion of the length of the post to provide a fiat surface, and the means for securing the dressing implement holder at any adjusted position on the post comprising, a screw threaded through said implement holder and a shoe with which the inner end of the screw has a rotative connection bearing against said fiat surface provided at one corner portion of the post, as specified.

4. In a dressing implement of the character described, a supporting base, a vertical post of rectangular cross section centrally located thereon, one corner portion of said post being cut away to provide a fiat vertical surface extending from the upper end of thepost to adjacent the bottom thereof, a hub located around the post and vertically adjustable thereon, a screw threaded through said hub opposite said flat surface on the post, a shoe within the hub having a fiat side bearing against said fiat surface and having a connection with said screw permitting rotation of the screw, two'arms on said hub extending in diametrically opposite directions, a dressing implement member carried by each arm and having a dressing implement thereon at its outer end, and corresponding guide members carried on the base one directly below each dressing implement and each having a guiding point, the outer end of which is in direct vertical alinement with the 'outer end of its corresponding dressing implement.

HENRY W. KROPF. 

